'Police dug up our garden, but they won't find our son - not because we hid his body but because we DIDN'T kill him': Parents who were arrested for the murder of their son 28 years after he vanished insist it is a monstrous slur
Steven Clark, 23, disappeared 28 years ago on a walk in Saltburn-by-the-Sea
Throughout the investigation the couple have professed their innocence
A letter was sent to Cleveland police seven years after Steven disappeared
Cleveland Police urge anyone with information to get in contact with them